1 /* 2 * super.c 3 * 4 * PURPOSE 5 * Super block routines for the OSTA-UDF(tm) filesystem. 6 * 7 * DESCRIPTION 8 * OSTA-UDF(tm) = Optical Storage Technology Association 9 * Universal Disk Format. 10 * 11 * This code is based on version 2.00 of the UDF specification, 12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. 13 * http://www.osta.org/ 14 * http://www.ecma.ch/ 15 * http://www.iso.org/ 16 * 17 * COPYRIGHT 18 * This file is distributed under the terms of the GNU General Public 19 * License (GPL). Copies of the GPL can be obtained from: 20 * ftp://prep.ai.mit.edu/pub/gnu/GPL 21 * Each contributing author retains all rights to their own work. 22 * 23 * (C) 1998 Dave Boynton 24 * (C) 1998-2004 Ben Fennema 25 * (C) 2000 Stelias Computing Inc 26 * 27 * HISTORY 28 * 29 * 09/24/98 dgb changed to allow compiling outside of kernel, and 30 * added some debugging. 31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 32 * 10/16/98 attempting some multi-session support 33 * 10/17/98 added freespace count for "df" 34 * 11/11/98 gr added novrs option 35 * 11/26/98 dgb added fileset,anchor mount options 36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced 37 * vol descs. rewrote option handling based on isofs 38 * 12/20/98 find the free space bitmap (if it exists) 39 */ 40 41 #include "udfdecl.h" 42 43 #include <linux/blkdev.h> 44 #include <linux/slab.h> 45 #include <linux/kernel.h> 46 #include <linux/module.h> 47 #include <linux/parser.h> 48 #include <linux/stat.h> 49 #include <linux/cdrom.h> 50 #include <linux/nls.h> 51 #include <linux/buffer_head.h> 52 #include <linux/vfs.h> 53 #include <linux/vmalloc.h> 54 #include <linux/errno.h> 55 #include <linux/mount.h> 56 #include <linux/seq_file.h> 57 #include <linux/bitmap.h> 58 #include <linux/crc-itu-t.h> 59 #include <asm/byteorder.h> 60 61 #include "udf_sb.h" 62 #include "udf_i.h" 63 64 #include <linux/init.h> 65 #include <asm/uaccess.h> 66 67 #define VDS_POS_PRIMARY_VOL_DESC 0 68 #define VDS_POS_UNALLOC_SPACE_DESC 1 69 #define VDS_POS_LOGICAL_VOL_DESC 2 70 #define VDS_POS_PARTITION_DESC 3 71 #define VDS_POS_IMP_USE_VOL_DESC 4 72 #define VDS_POS_VOL_DESC_PTR 5 73 #define VDS_POS_TERMINATING_DESC 6 74 #define VDS_POS_LENGTH 7 75 76 #define UDF_DEFAULT_BLOCKSIZE 2048 77 78 enum { UDF_MAX_LINKS = 0xffff }; 79 80 /* These are the "meat" - everything else is stuffing */ 81 static int udf_fill_super(struct super_block *, void *, int); 82 static void udf_put_super(struct super_block *); 83 static int udf_sync_fs(struct super_block *, int); 84 static int udf_remount_fs(struct super_block *, int *, char *); 85 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); 86 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, 87 struct kernel_lb_addr *); 88 static void udf_load_fileset(struct super_block *, struct buffer_head *, 89 struct kernel_lb_addr *); 90 static void udf_open_lvid(struct super_block *); 91 static void udf_close_lvid(struct super_block *); 92 static unsigned int udf_count_free(struct super_block *); 93 static int udf_statfs(struct dentry *, struct kstatfs *); 94 static int udf_show_options(struct seq_file *, struct dentry *); 95 96 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) 97 { 98 struct logicalVolIntegrityDesc *lvid = 99 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; 100 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); 101 __u32 offset = number_of_partitions * 2 * 102 sizeof(uint32_t)/sizeof(uint8_t); 103 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); 104 } 105 106 /* UDF filesystem type */ 107 static struct dentry *udf_mount(struct file_system_type *fs_type, 108 int flags, const char *dev_name, void *data) 109 { 110 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); 111 } 112 113 static struct file_system_type udf_fstype = { 114 .owner = THIS_MODULE, 115 .name = "udf", 116 .mount = udf_mount, 117 .kill_sb = kill_block_super, 118 .fs_flags = FS_REQUIRES_DEV, 119 }; 120 121 static struct kmem_cache *udf_inode_cachep; 122 123 static struct inode *udf_alloc_inode(struct super_block *sb) 124 { 125 struct udf_inode_info *ei; 126 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); 127 if (!ei) 128 return NULL; 129 130 ei->i_unique = 0; 131 ei->i_lenExtents = 0; 132 ei->i_next_alloc_block = 0; 133 ei->i_next_alloc_goal = 0; 134 ei->i_strat4096 = 0; 135 init_rwsem(&ei->i_data_sem); 136 137 return &ei->vfs_inode; 138 } 139 140 static void udf_i_callback(struct rcu_head *head) 141 { 142 struct inode *inode = container_of(head, struct inode, i_rcu); 143 kmem_cache_free(udf_inode_cachep, UDF_I(inode)); 144 } 145 146 static void udf_destroy_inode(struct inode *inode) 147 { 148 call_rcu(&inode->i_rcu, udf_i_callback); 149 } 150 151 static void init_once(void *foo) 152 { 153 struct udf_inode_info *ei = (struct udf_inode_info *)foo; 154 155 ei->i_ext.i_data = NULL; 156 inode_init_once(&ei->vfs_inode); 157 } 158 159 static int init_inodecache(void) 160 { 161 udf_inode_cachep = kmem_cache_create("udf_inode_cache", 162 sizeof(struct udf_inode_info), 163 0, (SLAB_RECLAIM_ACCOUNT | 164 SLAB_MEM_SPREAD), 165 init_once); 166 if (!udf_inode_cachep) 167 return -ENOMEM; 168 return 0; 169 } 170 171 static void destroy_inodecache(void) 172 { 173 kmem_cache_destroy(udf_inode_cachep); 174 } 175 176 /* Superblock operations */ 177 static const struct super_operations udf_sb_ops = { 178 .alloc_inode = udf_alloc_inode, 179 .destroy_inode = udf_destroy_inode, 180 .write_inode = udf_write_inode, 181 .evict_inode = udf_evict_inode, 182 .put_super = udf_put_super, 183 .sync_fs = udf_sync_fs, 184 .statfs = udf_statfs, 185 .remount_fs = udf_remount_fs, 186 .show_options = udf_show_options, 187 }; 188 189 struct udf_options { 190 unsigned char novrs; 191 unsigned int blocksize; 192 unsigned int session; 193 unsigned int lastblock; 194 unsigned int anchor; 195 unsigned int volume; 196 unsigned short partition; 197 unsigned int fileset; 198 unsigned int rootdir; 199 unsigned int flags; 200 umode_t umask; 201 gid_t gid; 202 uid_t uid; 203 umode_t fmode; 204 umode_t dmode; 205 struct nls_table *nls_map; 206 }; 207 208 static int __init init_udf_fs(void) 209 { 210 int err; 211 212 err = init_inodecache(); 213 if (err) 214 goto out1; 215 err = register_filesystem(&udf_fstype); 216 if (err) 217 goto out; 218 219 return 0; 220 221 out: 222 destroy_inodecache(); 223 224 out1: 225 return err; 226 } 227 228 static void __exit exit_udf_fs(void) 229 { 230 unregister_filesystem(&udf_fstype); 231 destroy_inodecache(); 232 } 233 234 module_init(init_udf_fs) 235 module_exit(exit_udf_fs) 236 237 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) 238 { 239 struct udf_sb_info *sbi = UDF_SB(sb); 240 241 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), 242 GFP_KERNEL); 243 if (!sbi->s_partmaps) { 244 udf_err(sb, "Unable to allocate space for %d partition maps\n", 245 count); 246 sbi->s_partitions = 0; 247 return -ENOMEM; 248 } 249 250 sbi->s_partitions = count; 251 return 0; 252 } 253 254 static int udf_show_options(struct seq_file *seq, struct dentry *root) 255 { 256 struct super_block *sb = root->d_sb; 257 struct udf_sb_info *sbi = UDF_SB(sb); 258 259 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) 260 seq_puts(seq, ",nostrict"); 261 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) 262 seq_printf(seq, ",bs=%lu", sb->s_blocksize); 263 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) 264 seq_puts(seq, ",unhide"); 265 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) 266 seq_puts(seq, ",undelete"); 267 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) 268 seq_puts(seq, ",noadinicb"); 269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) 270 seq_puts(seq, ",shortad"); 271 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) 272 seq_puts(seq, ",uid=forget"); 273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) 274 seq_puts(seq, ",uid=ignore"); 275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) 276 seq_puts(seq, ",gid=forget"); 277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) 278 seq_puts(seq, ",gid=ignore"); 279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) 280 seq_printf(seq, ",uid=%u", sbi->s_uid); 281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) 282 seq_printf(seq, ",gid=%u", sbi->s_gid); 283 if (sbi->s_umask != 0) 284 seq_printf(seq, ",umask=%ho", sbi->s_umask); 285 if (sbi->s_fmode != UDF_INVALID_MODE) 286 seq_printf(seq, ",mode=%ho", sbi->s_fmode); 287 if (sbi->s_dmode != UDF_INVALID_MODE) 288 seq_printf(seq, ",dmode=%ho", sbi->s_dmode); 289 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) 290 seq_printf(seq, ",session=%u", sbi->s_session); 291 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) 292 seq_printf(seq, ",lastblock=%u", sbi->s_last_block); 293 if (sbi->s_anchor != 0) 294 seq_printf(seq, ",anchor=%u", sbi->s_anchor); 295 /* 296 * volume, partition, fileset and rootdir seem to be ignored 297 * currently 298 */ 299 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) 300 seq_puts(seq, ",utf8"); 301 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) 302 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); 303 304 return 0; 305 } 306 307 /* 308 * udf_parse_options 309 * 310 * PURPOSE 311 * Parse mount options. 312 * 313 * DESCRIPTION 314 * The following mount options are supported: 315 * 316 * gid= Set the default group. 317 * umask= Set the default umask. 318 * mode= Set the default file permissions. 319 * dmode= Set the default directory permissions. 320 * uid= Set the default user. 321 * bs= Set the block size. 322 * unhide Show otherwise hidden files. 323 * undelete Show deleted files in lists. 324 * adinicb Embed data in the inode (default) 325 * noadinicb Don't embed data in the inode 326 * shortad Use short ad's 327 * longad Use long ad's (default) 328 * nostrict Unset strict conformance 329 * iocharset= Set the NLS character set 330 * 331 * The remaining are for debugging and disaster recovery: 332 * 333 * novrs Skip volume sequence recognition 334 * 335 * The following expect a offset from 0. 336 * 337 * session= Set the CDROM session (default= last session) 338 * anchor= Override standard anchor location. (default= 256) 339 * volume= Override the VolumeDesc location. (unused) 340 * partition= Override the PartitionDesc location. (unused) 341 * lastblock= Set the last block of the filesystem/ 342 * 343 * The following expect a offset from the partition root. 344 * 345 * fileset= Override the fileset block location. (unused) 346 * rootdir= Override the root directory location. (unused) 347 * WARNING: overriding the rootdir to a non-directory may 348 * yield highly unpredictable results. 349 * 350 * PRE-CONDITIONS 351 * options Pointer to mount options string. 352 * uopts Pointer to mount options variable. 353 * 354 * POST-CONDITIONS 355 * <return> 1 Mount options parsed okay. 356 * <return> 0 Error parsing mount options. 357 * 358 * HISTORY 359 * July 1, 1997 - Andrew E. Mileski 360 * Written, tested, and released. 361 */ 362 363 enum { 364 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, 365 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, 366 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, 367 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, 368 Opt_rootdir, Opt_utf8, Opt_iocharset, 369 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, 370 Opt_fmode, Opt_dmode 371 }; 372 373 static const match_table_t tokens = { 374 {Opt_novrs, "novrs"}, 375 {Opt_nostrict, "nostrict"}, 376 {Opt_bs, "bs=%u"}, 377 {Opt_unhide, "unhide"}, 378 {Opt_undelete, "undelete"}, 379 {Opt_noadinicb, "noadinicb"}, 380 {Opt_adinicb, "adinicb"}, 381 {Opt_shortad, "shortad"}, 382 {Opt_longad, "longad"}, 383 {Opt_uforget, "uid=forget"}, 384 {Opt_uignore, "uid=ignore"}, 385 {Opt_gforget, "gid=forget"}, 386 {Opt_gignore, "gid=ignore"}, 387 {Opt_gid, "gid=%u"}, 388 {Opt_uid, "uid=%u"}, 389 {Opt_umask, "umask=%o"}, 390 {Opt_session, "session=%u"}, 391 {Opt_lastblock, "lastblock=%u"}, 392 {Opt_anchor, "anchor=%u"}, 393 {Opt_volume, "volume=%u"}, 394 {Opt_partition, "partition=%u"}, 395 {Opt_fileset, "fileset=%u"}, 396 {Opt_rootdir, "rootdir=%u"}, 397 {Opt_utf8, "utf8"}, 398 {Opt_iocharset, "iocharset=%s"}, 399 {Opt_fmode, "mode=%o"}, 400 {Opt_dmode, "dmode=%o"}, 401 {Opt_err, NULL} 402 }; 403 404 static int udf_parse_options(char *options, struct udf_options *uopt, 405 bool remount) 406 { 407 char *p; 408 int option; 409 410 uopt->novrs = 0; 411 uopt->partition = 0xFFFF; 412 uopt->session = 0xFFFFFFFF; 413 uopt->lastblock = 0; 414 uopt->anchor = 0; 415 uopt->volume = 0xFFFFFFFF; 416 uopt->rootdir = 0xFFFFFFFF; 417 uopt->fileset = 0xFFFFFFFF; 418 uopt->nls_map = NULL; 419 420 if (!options) 421 return 1; 422 423 while ((p = strsep(&options, ",")) != NULL) { 424 substring_t args[MAX_OPT_ARGS]; 425 int token; 426 if (!*p) 427 continue; 428 429 token = match_token(p, tokens, args); 430 switch (token) { 431 case Opt_novrs: 432 uopt->novrs = 1; 433 break; 434 case Opt_bs: 435 if (match_int(&args[0], &option)) 436 return 0; 437 uopt->blocksize = option; 438 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); 439 break; 440 case Opt_unhide: 441 uopt->flags |= (1 << UDF_FLAG_UNHIDE); 442 break; 443 case Opt_undelete: 444 uopt->flags |= (1 << UDF_FLAG_UNDELETE); 445 break; 446 case Opt_noadinicb: 447 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); 448 break; 449 case Opt_adinicb: 450 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); 451 break; 452 case Opt_shortad: 453 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); 454 break; 455 case Opt_longad: 456 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); 457 break; 458 case Opt_gid: 459 if (match_int(args, &option)) 460 return 0; 461 uopt->gid = option; 462 uopt->flags |= (1 << UDF_FLAG_GID_SET); 463 break; 464 case Opt_uid: 465 if (match_int(args, &option)) 466 return 0; 467 uopt->uid = option; 468 uopt->flags |= (1 << UDF_FLAG_UID_SET); 469 break; 470 case Opt_umask: 471 if (match_octal(args, &option)) 472 return 0; 473 uopt->umask = option; 474 break; 475 case Opt_nostrict: 476 uopt->flags &= ~(1 << UDF_FLAG_STRICT); 477 break; 478 case Opt_session: 479 if (match_int(args, &option)) 480 return 0; 481 uopt->session = option; 482 if (!remount) 483 uopt->flags |= (1 << UDF_FLAG_SESSION_SET); 484 break; 485 case Opt_lastblock: 486 if (match_int(args, &option)) 487 return 0; 488 uopt->lastblock = option; 489 if (!remount) 490 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); 491 break; 492 case Opt_anchor: 493 if (match_int(args, &option)) 494 return 0; 495 uopt->anchor = option; 496 break; 497 case Opt_volume: 498 if (match_int(args, &option)) 499 return 0; 500 uopt->volume = option; 501 break; 502 case Opt_partition: 503 if (match_int(args, &option)) 504 return 0; 505 uopt->partition = option; 506 break; 507 case Opt_fileset: 508 if (match_int(args, &option)) 509 return 0; 510 uopt->fileset = option; 511 break; 512 case Opt_rootdir: 513 if (match_int(args, &option)) 514 return 0; 515 uopt->rootdir = option; 516 break; 517 case Opt_utf8: 518 uopt->flags |= (1 << UDF_FLAG_UTF8); 519 break; 520 #ifdef CONFIG_UDF_NLS 521 case Opt_iocharset: 522 uopt->nls_map = load_nls(args[0].from); 523 uopt->flags |= (1 << UDF_FLAG_NLS_MAP); 524 break; 525 #endif 526 case Opt_uignore: 527 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); 528 break; 529 case Opt_uforget: 530 uopt->flags |= (1 << UDF_FLAG_UID_FORGET); 531 break; 532 case Opt_gignore: 533 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); 534 break; 535 case Opt_gforget: 536 uopt->flags |= (1 << UDF_FLAG_GID_FORGET); 537 break; 538 case Opt_fmode: 539 if (match_octal(args, &option)) 540 return 0; 541 uopt->fmode = option & 0777; 542 break; 543 case Opt_dmode: 544 if (match_octal(args, &option)) 545 return 0; 546 uopt->dmode = option & 0777; 547 break; 548 default: 549 pr_err("bad mount option \"%s\" or missing value\n", p); 550 return 0; 551 } 552 } 553 return 1; 554 } 555 556 static int udf_remount_fs(struct super_block *sb, int *flags, char *options) 557 { 558 struct udf_options uopt; 559 struct udf_sb_info *sbi = UDF_SB(sb); 560 int error = 0; 561 562 uopt.flags = sbi->s_flags; 563 uopt.uid = sbi->s_uid; 564 uopt.gid = sbi->s_gid; 565 uopt.umask = sbi->s_umask; 566 uopt.fmode = sbi->s_fmode; 567 uopt.dmode = sbi->s_dmode; 568 569 if (!udf_parse_options(options, &uopt, true)) 570 return -EINVAL; 571 572 write_lock(&sbi->s_cred_lock); 573 sbi->s_flags = uopt.flags; 574 sbi->s_uid = uopt.uid; 575 sbi->s_gid = uopt.gid; 576 sbi->s_umask = uopt.umask; 577 sbi->s_fmode = uopt.fmode; 578 sbi->s_dmode = uopt.dmode; 579 write_unlock(&sbi->s_cred_lock); 580 581 if (sbi->s_lvid_bh) { 582 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); 583 if (write_rev > UDF_MAX_WRITE_VERSION) 584 *flags |= MS_RDONLY; 585 } 586 587 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 588 goto out_unlock; 589 590 if (*flags & MS_RDONLY) 591 udf_close_lvid(sb); 592 else 593 udf_open_lvid(sb); 594 595 out_unlock: 596 return error; 597 } 598 599 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ 600 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ 601 static loff_t udf_check_vsd(struct super_block *sb) 602 { 603 struct volStructDesc *vsd = NULL; 604 loff_t sector = 32768; 605 int sectorsize; 606 struct buffer_head *bh = NULL; 607 int nsr02 = 0; 608 int nsr03 = 0; 609 struct udf_sb_info *sbi; 610 611 sbi = UDF_SB(sb); 612 if (sb->s_blocksize < sizeof(struct volStructDesc)) 613 sectorsize = sizeof(struct volStructDesc); 614 else 615 sectorsize = sb->s_blocksize; 616 617 sector += (sbi->s_session << sb->s_blocksize_bits); 618 619 udf_debug("Starting at sector %u (%ld byte sectors)\n", 620 (unsigned int)(sector >> sb->s_blocksize_bits), 621 sb->s_blocksize); 622 /* Process the sequence (if applicable) */ 623 for (; !nsr02 && !nsr03; sector += sectorsize) { 624 /* Read a block */ 625 bh = udf_tread(sb, sector >> sb->s_blocksize_bits); 626 if (!bh) 627 break; 628 629 /* Look for ISO descriptors */ 630 vsd = (struct volStructDesc *)(bh->b_data + 631 (sector & (sb->s_blocksize - 1))); 632 633 if (vsd->stdIdent[0] == 0) { 634 brelse(bh); 635 break; 636 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, 637 VSD_STD_ID_LEN)) { 638 switch (vsd->structType) { 639 case 0: 640 udf_debug("ISO9660 Boot Record found\n"); 641 break; 642 case 1: 643 udf_debug("ISO9660 Primary Volume Descriptor found\n"); 644 break; 645 case 2: 646 udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); 647 break; 648 case 3: 649 udf_debug("ISO9660 Volume Partition Descriptor found\n"); 650 break; 651 case 255: 652 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); 653 break; 654 default: 655 udf_debug("ISO9660 VRS (%u) found\n", 656 vsd->structType); 657 break; 658 } 659 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, 660 VSD_STD_ID_LEN)) 661 ; /* nothing */ 662 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, 663 VSD_STD_ID_LEN)) { 664 brelse(bh); 665 break; 666 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, 667 VSD_STD_ID_LEN)) 668 nsr02 = sector; 669 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, 670 VSD_STD_ID_LEN)) 671 nsr03 = sector; 672 brelse(bh); 673 } 674 675 if (nsr03) 676 return nsr03; 677 else if (nsr02) 678 return nsr02; 679 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) 680 return -1; 681 else 682 return 0; 683 } 684 685 static int udf_find_fileset(struct super_block *sb, 686 struct kernel_lb_addr *fileset, 687 struct kernel_lb_addr *root) 688 { 689 struct buffer_head *bh = NULL; 690 long lastblock; 691 uint16_t ident; 692 struct udf_sb_info *sbi; 693 694 if (fileset->logicalBlockNum != 0xFFFFFFFF || 695 fileset->partitionReferenceNum != 0xFFFF) { 696 bh = udf_read_ptagged(sb, fileset, 0, &ident); 697 698 if (!bh) { 699 return 1; 700 } else if (ident != TAG_IDENT_FSD) { 701 brelse(bh); 702 return 1; 703 } 704 705 } 706 707 sbi = UDF_SB(sb); 708 if (!bh) { 709 /* Search backwards through the partitions */ 710 struct kernel_lb_addr newfileset; 711 712 /* --> cvg: FIXME - is it reasonable? */ 713 return 1; 714 715 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; 716 (newfileset.partitionReferenceNum != 0xFFFF && 717 fileset->logicalBlockNum == 0xFFFFFFFF && 718 fileset->partitionReferenceNum == 0xFFFF); 719 newfileset.partitionReferenceNum--) { 720 lastblock = sbi->s_partmaps 721 [newfileset.partitionReferenceNum] 722 .s_partition_len; 723 newfileset.logicalBlockNum = 0; 724 725 do { 726 bh = udf_read_ptagged(sb, &newfileset, 0, 727 &ident); 728 if (!bh) { 729 newfileset.logicalBlockNum++; 730 continue; 731 } 732 733 switch (ident) { 734 case TAG_IDENT_SBD: 735 { 736 struct spaceBitmapDesc *sp; 737 sp = (struct spaceBitmapDesc *) 738 bh->b_data; 739 newfileset.logicalBlockNum += 1 + 740 ((le32_to_cpu(sp->numOfBytes) + 741 sizeof(struct spaceBitmapDesc) 742 - 1) >> sb->s_blocksize_bits); 743 brelse(bh); 744 break; 745 } 746 case TAG_IDENT_FSD: 747 *fileset = newfileset; 748 break; 749 default: 750 newfileset.logicalBlockNum++; 751 brelse(bh); 752 bh = NULL; 753 break; 754 } 755 } while (newfileset.logicalBlockNum < lastblock && 756 fileset->logicalBlockNum == 0xFFFFFFFF && 757 fileset->partitionReferenceNum == 0xFFFF); 758 } 759 } 760 761 if ((fileset->logicalBlockNum != 0xFFFFFFFF || 762 fileset->partitionReferenceNum != 0xFFFF) && bh) { 763 udf_debug("Fileset at block=%d, partition=%d\n", 764 fileset->logicalBlockNum, 765 fileset->partitionReferenceNum); 766 767 sbi->s_partition = fileset->partitionReferenceNum; 768 udf_load_fileset(sb, bh, root); 769 brelse(bh); 770 return 0; 771 } 772 return 1; 773 } 774 775 static int udf_load_pvoldesc(struct super_block *sb, sector_t block) 776 { 777 struct primaryVolDesc *pvoldesc; 778 struct ustr *instr, *outstr; 779 struct buffer_head *bh; 780 uint16_t ident; 781 int ret = 1; 782 783 instr = kmalloc(sizeof(struct ustr), GFP_NOFS); 784 if (!instr) 785 return 1; 786 787 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); 788 if (!outstr) 789 goto out1; 790 791 bh = udf_read_tagged(sb, block, block, &ident); 792 if (!bh) 793 goto out2; 794 795 BUG_ON(ident != TAG_IDENT_PVD); 796 797 pvoldesc = (struct primaryVolDesc *)bh->b_data; 798 799 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, 800 pvoldesc->recordingDateAndTime)) { 801 #ifdef UDFFS_DEBUG 802 struct timestamp *ts = &pvoldesc->recordingDateAndTime; 803 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", 804 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, 805 ts->minute, le16_to_cpu(ts->typeAndTimezone)); 806 #endif 807 } 808 809 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) 810 if (udf_CS0toUTF8(outstr, instr)) { 811 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, 812 outstr->u_len > 31 ? 31 : outstr->u_len); 813 udf_debug("volIdent[] = '%s'\n", 814 UDF_SB(sb)->s_volume_ident); 815 } 816 817 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) 818 if (udf_CS0toUTF8(outstr, instr)) 819 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); 820 821 brelse(bh); 822 ret = 0; 823 out2: 824 kfree(outstr); 825 out1: 826 kfree(instr); 827 return ret; 828 } 829 830 struct inode *udf_find_metadata_inode_efe(struct super_block *sb, 831 u32 meta_file_loc, u32 partition_num) 832 { 833 struct kernel_lb_addr addr; 834 struct inode *metadata_fe; 835 836 addr.logicalBlockNum = meta_file_loc; 837 addr.partitionReferenceNum = partition_num; 838 839 metadata_fe = udf_iget(sb, &addr); 840 841 if (metadata_fe == NULL) 842 udf_warn(sb, "metadata inode efe not found\n"); 843 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { 844 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); 845 iput(metadata_fe); 846 metadata_fe = NULL; 847 } 848 849 return metadata_fe; 850 } 851 852 static int udf_load_metadata_files(struct super_block *sb, int partition) 853 { 854 struct udf_sb_info *sbi = UDF_SB(sb); 855 struct udf_part_map *map; 856 struct udf_meta_data *mdata; 857 struct kernel_lb_addr addr; 858 859 map = &sbi->s_partmaps[partition]; 860 mdata = &map->s_type_specific.s_metadata; 861 862 /* metadata address */ 863 udf_debug("Metadata file location: block = %d part = %d\n", 864 mdata->s_meta_file_loc, map->s_partition_num); 865 866 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, 867 mdata->s_meta_file_loc, map->s_partition_num); 868 869 if (mdata->s_metadata_fe == NULL) { 870 /* mirror file entry */ 871 udf_debug("Mirror metadata file location: block = %d part = %d\n", 872 mdata->s_mirror_file_loc, map->s_partition_num); 873 874 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, 875 mdata->s_mirror_file_loc, map->s_partition_num); 876 877 if (mdata->s_mirror_fe == NULL) { 878 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); 879 goto error_exit; 880 } 881 } 882 883 /* 884 * bitmap file entry 885 * Note: 886 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) 887 */ 888 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { 889 addr.logicalBlockNum = mdata->s_bitmap_file_loc; 890 addr.partitionReferenceNum = map->s_partition_num; 891 892 udf_debug("Bitmap file location: block = %d part = %d\n", 893 addr.logicalBlockNum, addr.partitionReferenceNum); 894 895 mdata->s_bitmap_fe = udf_iget(sb, &addr); 896 897 if (mdata->s_bitmap_fe == NULL) { 898 if (sb->s_flags & MS_RDONLY) 899 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); 900 else { 901 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); 902 goto error_exit; 903 } 904 } 905 } 906 907 udf_debug("udf_load_metadata_files Ok\n"); 908 909 return 0; 910 911 error_exit: 912 return 1; 913 } 914 915 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, 916 struct kernel_lb_addr *root) 917 { 918 struct fileSetDesc *fset; 919 920 fset = (struct fileSetDesc *)bh->b_data; 921 922 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); 923 924 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); 925 926 udf_debug("Rootdir at block=%d, partition=%d\n", 927 root->logicalBlockNum, root->partitionReferenceNum); 928 } 929 930 int udf_compute_nr_groups(struct super_block *sb, u32 partition) 931 { 932 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; 933 return DIV_ROUND_UP(map->s_partition_len + 934 (sizeof(struct spaceBitmapDesc) << 3), 935 sb->s_blocksize * 8); 936 } 937 938 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) 939 { 940 struct udf_bitmap *bitmap; 941 int nr_groups; 942 int size; 943 944 nr_groups = udf_compute_nr_groups(sb, index); 945 size = sizeof(struct udf_bitmap) + 946 (sizeof(struct buffer_head *) * nr_groups); 947 948 if (size <= PAGE_SIZE) 949 bitmap = kzalloc(size, GFP_KERNEL); 950 else 951 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ 952 953 if (bitmap == NULL) { 954 udf_err(sb, "Unable to allocate space for bitmap and %d buffer_head pointers\n", 955 nr_groups); 956 return NULL; 957 } 958 959 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); 960 bitmap->s_nr_groups = nr_groups; 961 return bitmap; 962 } 963 964 static int udf_fill_partdesc_info(struct super_block *sb, 965 struct partitionDesc *p, int p_index) 966 { 967 struct udf_part_map *map; 968 struct udf_sb_info *sbi = UDF_SB(sb); 969 struct partitionHeaderDesc *phd; 970 971 map = &sbi->s_partmaps[p_index]; 972 973 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ 974 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); 975 976 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) 977 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; 978 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) 979 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; 980 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) 981 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; 982 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) 983 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; 984 985 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", 986 p_index, map->s_partition_type, 987 map->s_partition_root, map->s_partition_len); 988 989 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && 990 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) 991 return 0; 992 993 phd = (struct partitionHeaderDesc *)p->partitionContentsUse; 994 if (phd->unallocSpaceTable.extLength) { 995 struct kernel_lb_addr loc = { 996 .logicalBlockNum = le32_to_cpu( 997 phd->unallocSpaceTable.extPosition), 998 .partitionReferenceNum = p_index, 999 }; 1000 1001 map->s_uspace.s_table = udf_iget(sb, &loc); 1002 if (!map->s_uspace.s_table) { 1003 udf_debug("cannot load unallocSpaceTable (part %d)\n", 1004 p_index); 1005 return 1; 1006 } 1007 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; 1008 udf_debug("unallocSpaceTable (part %d) @ %ld\n", 1009 p_index, map->s_uspace.s_table->i_ino); 1010 } 1011 1012 if (phd->unallocSpaceBitmap.extLength) { 1013 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); 1014 if (!bitmap) 1015 return 1; 1016 map->s_uspace.s_bitmap = bitmap; 1017 bitmap->s_extLength = le32_to_cpu( 1018 phd->unallocSpaceBitmap.extLength); 1019 bitmap->s_extPosition = le32_to_cpu( 1020 phd->unallocSpaceBitmap.extPosition); 1021 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; 1022 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", 1023 p_index, bitmap->s_extPosition); 1024 } 1025 1026 if (phd->partitionIntegrityTable.extLength) 1027 udf_debug("partitionIntegrityTable (part %d)\n", p_index); 1028 1029 if (phd->freedSpaceTable.extLength) { 1030 struct kernel_lb_addr loc = { 1031 .logicalBlockNum = le32_to_cpu( 1032 phd->freedSpaceTable.extPosition), 1033 .partitionReferenceNum = p_index, 1034 }; 1035 1036 map->s_fspace.s_table = udf_iget(sb, &loc); 1037 if (!map->s_fspace.s_table) { 1038 udf_debug("cannot load freedSpaceTable (part %d)\n", 1039 p_index); 1040 return 1; 1041 } 1042 1043 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; 1044 udf_debug("freedSpaceTable (part %d) @ %ld\n", 1045 p_index, map->s_fspace.s_table->i_ino); 1046 } 1047 1048 if (phd->freedSpaceBitmap.extLength) { 1049 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); 1050 if (!bitmap) 1051 return 1; 1052 map->s_fspace.s_bitmap = bitmap; 1053 bitmap->s_extLength = le32_to_cpu( 1054 phd->freedSpaceBitmap.extLength); 1055 bitmap->s_extPosition = le32_to_cpu( 1056 phd->freedSpaceBitmap.extPosition); 1057 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; 1058 udf_debug("freedSpaceBitmap (part %d) @ %d\n", 1059 p_index, bitmap->s_extPosition); 1060 } 1061 return 0; 1062 } 1063 1064 static void udf_find_vat_block(struct super_block *sb, int p_index, 1065 int type1_index, sector_t start_block) 1066 { 1067 struct udf_sb_info *sbi = UDF_SB(sb); 1068 struct udf_part_map *map = &sbi->s_partmaps[p_index]; 1069 sector_t vat_block; 1070 struct kernel_lb_addr ino; 1071 1072 /* 1073 * VAT file entry is in the last recorded block. Some broken disks have 1074 * it a few blocks before so try a bit harder... 1075 */ 1076 ino.partitionReferenceNum = type1_index; 1077 for (vat_block = start_block; 1078 vat_block >= map->s_partition_root && 1079 vat_block >= start_block - 3 && 1080 !sbi->s_vat_inode; vat_block--) { 1081 ino.logicalBlockNum = vat_block - map->s_partition_root; 1082 sbi->s_vat_inode = udf_iget(sb, &ino); 1083 } 1084 } 1085 1086 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) 1087 { 1088 struct udf_sb_info *sbi = UDF_SB(sb); 1089 struct udf_part_map *map = &sbi->s_partmaps[p_index]; 1090 struct buffer_head *bh = NULL; 1091 struct udf_inode_info *vati; 1092 uint32_t pos; 1093 struct virtualAllocationTable20 *vat20; 1094 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 1095 1096 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); 1097 if (!sbi->s_vat_inode && 1098 sbi->s_last_block != blocks - 1) { 1099 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", 1100 (unsigned long)sbi->s_last_block, 1101 (unsigned long)blocks - 1); 1102 udf_find_vat_block(sb, p_index, type1_index, blocks - 1); 1103 } 1104 if (!sbi->s_vat_inode) 1105 return 1; 1106 1107 if (map->s_partition_type == UDF_VIRTUAL_MAP15) { 1108 map->s_type_specific.s_virtual.s_start_offset = 0; 1109 map->s_type_specific.s_virtual.s_num_entries = 1110 (sbi->s_vat_inode->i_size - 36) >> 2; 1111 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { 1112 vati = UDF_I(sbi->s_vat_inode); 1113 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 1114 pos = udf_block_map(sbi->s_vat_inode, 0); 1115 bh = sb_bread(sb, pos); 1116 if (!bh) 1117 return 1; 1118 vat20 = (struct virtualAllocationTable20 *)bh->b_data; 1119 } else { 1120 vat20 = (struct virtualAllocationTable20 *) 1121 vati->i_ext.i_data; 1122 } 1123 1124 map->s_type_specific.s_virtual.s_start_offset = 1125 le16_to_cpu(vat20->lengthHeader); 1126 map->s_type_specific.s_virtual.s_num_entries = 1127 (sbi->s_vat_inode->i_size - 1128 map->s_type_specific.s_virtual. 1129 s_start_offset) >> 2; 1130 brelse(bh); 1131 } 1132 return 0; 1133 } 1134 1135 static int udf_load_partdesc(struct super_block *sb, sector_t block) 1136 { 1137 struct buffer_head *bh; 1138 struct partitionDesc *p; 1139 struct udf_part_map *map; 1140 struct udf_sb_info *sbi = UDF_SB(sb); 1141 int i, type1_idx; 1142 uint16_t partitionNumber; 1143 uint16_t ident; 1144 int ret = 0; 1145 1146 bh = udf_read_tagged(sb, block, block, &ident); 1147 if (!bh) 1148 return 1; 1149 if (ident != TAG_IDENT_PD) 1150 goto out_bh; 1151 1152 p = (struct partitionDesc *)bh->b_data; 1153 partitionNumber = le16_to_cpu(p->partitionNumber); 1154 1155 /* First scan for TYPE1, SPARABLE and METADATA partitions */ 1156 for (i = 0; i < sbi->s_partitions; i++) { 1157 map = &sbi->s_partmaps[i]; 1158 udf_debug("Searching map: (%d == %d)\n", 1159 map->s_partition_num, partitionNumber); 1160 if (map->s_partition_num == partitionNumber && 1161 (map->s_partition_type == UDF_TYPE1_MAP15 || 1162 map->s_partition_type == UDF_SPARABLE_MAP15)) 1163 break; 1164 } 1165 1166 if (i >= sbi->s_partitions) { 1167 udf_debug("Partition (%d) not found in partition map\n", 1168 partitionNumber); 1169 goto out_bh; 1170 } 1171 1172 ret = udf_fill_partdesc_info(sb, p, i); 1173 1174 /* 1175 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and 1176 * PHYSICAL partitions are already set up 1177 */ 1178 type1_idx = i; 1179 for (i = 0; i < sbi->s_partitions; i++) { 1180 map = &sbi->s_partmaps[i]; 1181 1182 if (map->s_partition_num == partitionNumber && 1183 (map->s_partition_type == UDF_VIRTUAL_MAP15 || 1184 map->s_partition_type == UDF_VIRTUAL_MAP20 || 1185 map->s_partition_type == UDF_METADATA_MAP25)) 1186 break; 1187 } 1188 1189 if (i >= sbi->s_partitions) 1190 goto out_bh; 1191 1192 ret = udf_fill_partdesc_info(sb, p, i); 1193 if (ret) 1194 goto out_bh; 1195 1196 if (map->s_partition_type == UDF_METADATA_MAP25) { 1197 ret = udf_load_metadata_files(sb, i); 1198 if (ret) { 1199 udf_err(sb, "error loading MetaData partition map %d\n", 1200 i); 1201 goto out_bh; 1202 } 1203 } else { 1204 ret = udf_load_vat(sb, i, type1_idx); 1205 if (ret) 1206 goto out_bh; 1207 /* 1208 * Mark filesystem read-only if we have a partition with 1209 * virtual map since we don't handle writing to it (we 1210 * overwrite blocks instead of relocating them). 1211 */ 1212 sb->s_flags |= MS_RDONLY; 1213 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); 1214 } 1215 out_bh: 1216 /* In case loading failed, we handle cleanup in udf_fill_super */ 1217 brelse(bh); 1218 return ret; 1219 } 1220 1221 static int udf_load_logicalvol(struct super_block *sb, sector_t block, 1222 struct kernel_lb_addr *fileset) 1223 { 1224 struct logicalVolDesc *lvd; 1225 int i, j, offset; 1226 uint8_t type; 1227 struct udf_sb_info *sbi = UDF_SB(sb); 1228 struct genericPartitionMap *gpm; 1229 uint16_t ident; 1230 struct buffer_head *bh; 1231 int ret = 0; 1232 1233 bh = udf_read_tagged(sb, block, block, &ident); 1234 if (!bh) 1235 return 1; 1236 BUG_ON(ident != TAG_IDENT_LVD); 1237 lvd = (struct logicalVolDesc *)bh->b_data; 1238 1239 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); 1240 if (i != 0) { 1241 ret = i; 1242 goto out_bh; 1243 } 1244 1245 for (i = 0, offset = 0; 1246 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); 1247 i++, offset += gpm->partitionMapLength) { 1248 struct udf_part_map *map = &sbi->s_partmaps[i]; 1249 gpm = (struct genericPartitionMap *) 1250 &(lvd->partitionMaps[offset]); 1251 type = gpm->partitionMapType; 1252 if (type == 1) { 1253 struct genericPartitionMap1 *gpm1 = 1254 (struct genericPartitionMap1 *)gpm; 1255 map->s_partition_type = UDF_TYPE1_MAP15; 1256 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); 1257 map->s_partition_num = le16_to_cpu(gpm1->partitionNum); 1258 map->s_partition_func = NULL; 1259 } else if (type == 2) { 1260 struct udfPartitionMap2 *upm2 = 1261 (struct udfPartitionMap2 *)gpm; 1262 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, 1263 strlen(UDF_ID_VIRTUAL))) { 1264 u16 suf = 1265 le16_to_cpu(((__le16 *)upm2->partIdent. 1266 identSuffix)[0]); 1267 if (suf < 0x0200) { 1268 map->s_partition_type = 1269 UDF_VIRTUAL_MAP15; 1270 map->s_partition_func = 1271 udf_get_pblock_virt15; 1272 } else { 1273 map->s_partition_type = 1274 UDF_VIRTUAL_MAP20; 1275 map->s_partition_func = 1276 udf_get_pblock_virt20; 1277 } 1278 } else if (!strncmp(upm2->partIdent.ident, 1279 UDF_ID_SPARABLE, 1280 strlen(UDF_ID_SPARABLE))) { 1281 uint32_t loc; 1282 struct sparingTable *st; 1283 struct sparablePartitionMap *spm = 1284 (struct sparablePartitionMap *)gpm; 1285 1286 map->s_partition_type = UDF_SPARABLE_MAP15; 1287 map->s_type_specific.s_sparing.s_packet_len = 1288 le16_to_cpu(spm->packetLength); 1289 for (j = 0; j < spm->numSparingTables; j++) { 1290 struct buffer_head *bh2; 1291 1292 loc = le32_to_cpu( 1293 spm->locSparingTable[j]); 1294 bh2 = udf_read_tagged(sb, loc, loc, 1295 &ident); 1296 map->s_type_specific.s_sparing. 1297 s_spar_map[j] = bh2; 1298 1299 if (bh2 == NULL) 1300 continue; 1301 1302 st = (struct sparingTable *)bh2->b_data; 1303 if (ident != 0 || strncmp( 1304 st->sparingIdent.ident, 1305 UDF_ID_SPARING, 1306 strlen(UDF_ID_SPARING))) { 1307 brelse(bh2); 1308 map->s_type_specific.s_sparing. 1309 s_spar_map[j] = NULL; 1310 } 1311 } 1312 map->s_partition_func = udf_get_pblock_spar15; 1313 } else if (!strncmp(upm2->partIdent.ident, 1314 UDF_ID_METADATA, 1315 strlen(UDF_ID_METADATA))) { 1316 struct udf_meta_data *mdata = 1317 &map->s_type_specific.s_metadata; 1318 struct metadataPartitionMap *mdm = 1319 (struct metadataPartitionMap *) 1320 &(lvd->partitionMaps[offset]); 1321 udf_debug("Parsing Logical vol part %d type %d id=%s\n", 1322 i, type, UDF_ID_METADATA); 1323 1324 map->s_partition_type = UDF_METADATA_MAP25; 1325 map->s_partition_func = udf_get_pblock_meta25; 1326 1327 mdata->s_meta_file_loc = 1328 le32_to_cpu(mdm->metadataFileLoc); 1329 mdata->s_mirror_file_loc = 1330 le32_to_cpu(mdm->metadataMirrorFileLoc); 1331 mdata->s_bitmap_file_loc = 1332 le32_to_cpu(mdm->metadataBitmapFileLoc); 1333 mdata->s_alloc_unit_size = 1334 le32_to_cpu(mdm->allocUnitSize); 1335 mdata->s_align_unit_size = 1336 le16_to_cpu(mdm->alignUnitSize); 1337 if (mdm->flags & 0x01) 1338 mdata->s_flags |= MF_DUPLICATE_MD; 1339 1340 udf_debug("Metadata Ident suffix=0x%x\n", 1341 le16_to_cpu(*(__le16 *) 1342 mdm->partIdent.identSuffix)); 1343 udf_debug("Metadata part num=%d\n", 1344 le16_to_cpu(mdm->partitionNum)); 1345 udf_debug("Metadata part alloc unit size=%d\n", 1346 le32_to_cpu(mdm->allocUnitSize)); 1347 udf_debug("Metadata file loc=%d\n", 1348 le32_to_cpu(mdm->metadataFileLoc)); 1349 udf_debug("Mirror file loc=%d\n", 1350 le32_to_cpu(mdm->metadataMirrorFileLoc)); 1351 udf_debug("Bitmap file loc=%d\n", 1352 le32_to_cpu(mdm->metadataBitmapFileLoc)); 1353 udf_debug("Flags: %d %d\n", 1354 mdata->s_flags, mdm->flags); 1355 } else { 1356 udf_debug("Unknown ident: %s\n", 1357 upm2->partIdent.ident); 1358 continue; 1359 } 1360 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); 1361 map->s_partition_num = le16_to_cpu(upm2->partitionNum); 1362 } 1363 udf_debug("Partition (%d:%d) type %d on volume %d\n", 1364 i, map->s_partition_num, type, map->s_volumeseqnum); 1365 } 1366 1367 if (fileset) { 1368 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); 1369 1370 *fileset = lelb_to_cpu(la->extLocation); 1371 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", 1372 fileset->logicalBlockNum, 1373 fileset->partitionReferenceNum); 1374 } 1375 if (lvd->integritySeqExt.extLength) 1376 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); 1377 1378 out_bh: 1379 brelse(bh); 1380 return ret; 1381 } 1382 1383 /* 1384 * udf_load_logicalvolint 1385 * 1386 */ 1387 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) 1388 { 1389 struct buffer_head *bh = NULL; 1390 uint16_t ident; 1391 struct udf_sb_info *sbi = UDF_SB(sb); 1392 struct logicalVolIntegrityDesc *lvid; 1393 1394 while (loc.extLength > 0 && 1395 (bh = udf_read_tagged(sb, loc.extLocation, 1396 loc.extLocation, &ident)) && 1397 ident == TAG_IDENT_LVID) { 1398 sbi->s_lvid_bh = bh; 1399 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1400 1401 if (lvid->nextIntegrityExt.extLength) 1402 udf_load_logicalvolint(sb, 1403 leea_to_cpu(lvid->nextIntegrityExt)); 1404 1405 if (sbi->s_lvid_bh != bh) 1406 brelse(bh); 1407 loc.extLength -= sb->s_blocksize; 1408 loc.extLocation++; 1409 } 1410 if (sbi->s_lvid_bh != bh) 1411 brelse(bh); 1412 } 1413 1414 /* 1415 * udf_process_sequence 1416 * 1417 * PURPOSE 1418 * Process a main/reserve volume descriptor sequence. 1419 * 1420 * PRE-CONDITIONS 1421 * sb Pointer to _locked_ superblock. 1422 * block First block of first extent of the sequence. 1423 * lastblock Lastblock of first extent of the sequence. 1424 * 1425 * HISTORY 1426 * July 1, 1997 - Andrew E. Mileski 1427 * Written, tested, and released. 1428 */ 1429 static noinline int udf_process_sequence(struct super_block *sb, long block, 1430 long lastblock, struct kernel_lb_addr *fileset) 1431 { 1432 struct buffer_head *bh = NULL; 1433 struct udf_vds_record vds[VDS_POS_LENGTH]; 1434 struct udf_vds_record *curr; 1435 struct generic_desc *gd; 1436 struct volDescPtr *vdp; 1437 int done = 0; 1438 uint32_t vdsn; 1439 uint16_t ident; 1440 long next_s = 0, next_e = 0; 1441 1442 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); 1443 1444 /* 1445 * Read the main descriptor sequence and find which descriptors 1446 * are in it. 1447 */ 1448 for (; (!done && block <= lastblock); block++) { 1449 1450 bh = udf_read_tagged(sb, block, block, &ident); 1451 if (!bh) { 1452 udf_err(sb, 1453 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", 1454 (unsigned long long)block); 1455 return 1; 1456 } 1457 1458 /* Process each descriptor (ISO 13346 3/8.3-8.4) */ 1459 gd = (struct generic_desc *)bh->b_data; 1460 vdsn = le32_to_cpu(gd->volDescSeqNum); 1461 switch (ident) { 1462 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ 1463 curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; 1464 if (vdsn >= curr->volDescSeqNum) { 1465 curr->volDescSeqNum = vdsn; 1466 curr->block = block; 1467 } 1468 break; 1469 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ 1470 curr = &vds[VDS_POS_VOL_DESC_PTR]; 1471 if (vdsn >= curr->volDescSeqNum) { 1472 curr->volDescSeqNum = vdsn; 1473 curr->block = block; 1474 1475 vdp = (struct volDescPtr *)bh->b_data; 1476 next_s = le32_to_cpu( 1477 vdp->nextVolDescSeqExt.extLocation); 1478 next_e = le32_to_cpu( 1479 vdp->nextVolDescSeqExt.extLength); 1480 next_e = next_e >> sb->s_blocksize_bits; 1481 next_e += next_s; 1482 } 1483 break; 1484 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ 1485 curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; 1486 if (vdsn >= curr->volDescSeqNum) { 1487 curr->volDescSeqNum = vdsn; 1488 curr->block = block; 1489 } 1490 break; 1491 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ 1492 curr = &vds[VDS_POS_PARTITION_DESC]; 1493 if (!curr->block) 1494 curr->block = block; 1495 break; 1496 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ 1497 curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; 1498 if (vdsn >= curr->volDescSeqNum) { 1499 curr->volDescSeqNum = vdsn; 1500 curr->block = block; 1501 } 1502 break; 1503 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ 1504 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; 1505 if (vdsn >= curr->volDescSeqNum) { 1506 curr->volDescSeqNum = vdsn; 1507 curr->block = block; 1508 } 1509 break; 1510 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ 1511 vds[VDS_POS_TERMINATING_DESC].block = block; 1512 if (next_e) { 1513 block = next_s; 1514 lastblock = next_e; 1515 next_s = next_e = 0; 1516 } else 1517 done = 1; 1518 break; 1519 } 1520 brelse(bh); 1521 } 1522 /* 1523 * Now read interesting descriptors again and process them 1524 * in a suitable order 1525 */ 1526 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { 1527 udf_err(sb, "Primary Volume Descriptor not found!\n"); 1528 return 1; 1529 } 1530 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) 1531 return 1; 1532 1533 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, 1534 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) 1535 return 1; 1536 1537 if (vds[VDS_POS_PARTITION_DESC].block) { 1538 /* 1539 * We rescan the whole descriptor sequence to find 1540 * partition descriptor blocks and process them. 1541 */ 1542 for (block = vds[VDS_POS_PARTITION_DESC].block; 1543 block < vds[VDS_POS_TERMINATING_DESC].block; 1544 block++) 1545 if (udf_load_partdesc(sb, block)) 1546 return 1; 1547 } 1548 1549 return 0; 1550 } 1551 1552 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, 1553 struct kernel_lb_addr *fileset) 1554 { 1555 struct anchorVolDescPtr *anchor; 1556 long main_s, main_e, reserve_s, reserve_e; 1557 1558 anchor = (struct anchorVolDescPtr *)bh->b_data; 1559 1560 /* Locate the main sequence */ 1561 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); 1562 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); 1563 main_e = main_e >> sb->s_blocksize_bits; 1564 main_e += main_s; 1565 1566 /* Locate the reserve sequence */ 1567 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); 1568 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); 1569 reserve_e = reserve_e >> sb->s_blocksize_bits; 1570 reserve_e += reserve_s; 1571 1572 /* Process the main & reserve sequences */ 1573 /* responsible for finding the PartitionDesc(s) */ 1574 if (!udf_process_sequence(sb, main_s, main_e, fileset)) 1575 return 1; 1576 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); 1577 } 1578 1579 /* 1580 * Check whether there is an anchor block in the given block and 1581 * load Volume Descriptor Sequence if so. 1582 */ 1583 static int udf_check_anchor_block(struct super_block *sb, sector_t block, 1584 struct kernel_lb_addr *fileset) 1585 { 1586 struct buffer_head *bh; 1587 uint16_t ident; 1588 int ret; 1589 1590 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && 1591 udf_fixed_to_variable(block) >= 1592 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) 1593 return 0; 1594 1595 bh = udf_read_tagged(sb, block, block, &ident); 1596 if (!bh) 1597 return 0; 1598 if (ident != TAG_IDENT_AVDP) { 1599 brelse(bh); 1600 return 0; 1601 } 1602 ret = udf_load_sequence(sb, bh, fileset); 1603 brelse(bh); 1604 return ret; 1605 } 1606 1607 /* Search for an anchor volume descriptor pointer */ 1608 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, 1609 struct kernel_lb_addr *fileset) 1610 { 1611 sector_t last[6]; 1612 int i; 1613 struct udf_sb_info *sbi = UDF_SB(sb); 1614 int last_count = 0; 1615 1616 /* First try user provided anchor */ 1617 if (sbi->s_anchor) { 1618 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) 1619 return lastblock; 1620 } 1621 /* 1622 * according to spec, anchor is in either: 1623 * block 256 1624 * lastblock-256 1625 * lastblock 1626 * however, if the disc isn't closed, it could be 512. 1627 */ 1628 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) 1629 return lastblock; 1630 /* 1631 * The trouble is which block is the last one. Drives often misreport 1632 * this so we try various possibilities. 1633 */ 1634 last[last_count++] = lastblock; 1635 if (lastblock >= 1) 1636 last[last_count++] = lastblock - 1; 1637 last[last_count++] = lastblock + 1; 1638 if (lastblock >= 2) 1639 last[last_count++] = lastblock - 2; 1640 if (lastblock >= 150) 1641 last[last_count++] = lastblock - 150; 1642 if (lastblock >= 152) 1643 last[last_count++] = lastblock - 152; 1644 1645 for (i = 0; i < last_count; i++) { 1646 if (last[i] >= sb->s_bdev->bd_inode->i_size >> 1647 sb->s_blocksize_bits) 1648 continue; 1649 if (udf_check_anchor_block(sb, last[i], fileset)) 1650 return last[i]; 1651 if (last[i] < 256) 1652 continue; 1653 if (udf_check_anchor_block(sb, last[i] - 256, fileset)) 1654 return last[i]; 1655 } 1656 1657 /* Finally try block 512 in case media is open */ 1658 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) 1659 return last[0]; 1660 return 0; 1661 } 1662 1663 /* 1664 * Find an anchor volume descriptor and load Volume Descriptor Sequence from 1665 * area specified by it. The function expects sbi->s_lastblock to be the last 1666 * block on the media. 1667 * 1668 * Return 1 if ok, 0 if not found. 1669 * 1670 */ 1671 static int udf_find_anchor(struct super_block *sb, 1672 struct kernel_lb_addr *fileset) 1673 { 1674 sector_t lastblock; 1675 struct udf_sb_info *sbi = UDF_SB(sb); 1676 1677 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); 1678 if (lastblock) 1679 goto out; 1680 1681 /* No anchor found? Try VARCONV conversion of block numbers */ 1682 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); 1683 /* Firstly, we try to not convert number of the last block */ 1684 lastblock = udf_scan_anchors(sb, 1685 udf_variable_to_fixed(sbi->s_last_block), 1686 fileset); 1687 if (lastblock) 1688 goto out; 1689 1690 /* Secondly, we try with converted number of the last block */ 1691 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); 1692 if (!lastblock) { 1693 /* VARCONV didn't help. Clear it. */ 1694 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); 1695 return 0; 1696 } 1697 out: 1698 sbi->s_last_block = lastblock; 1699 return 1; 1700 } 1701 1702 /* 1703 * Check Volume Structure Descriptor, find Anchor block and load Volume 1704 * Descriptor Sequence 1705 */ 1706 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, 1707 int silent, struct kernel_lb_addr *fileset) 1708 { 1709 struct udf_sb_info *sbi = UDF_SB(sb); 1710 loff_t nsr_off; 1711 1712 if (!sb_set_blocksize(sb, uopt->blocksize)) { 1713 if (!silent) 1714 udf_warn(sb, "Bad block size\n"); 1715 return 0; 1716 } 1717 sbi->s_last_block = uopt->lastblock; 1718 if (!uopt->novrs) { 1719 /* Check that it is NSR02 compliant */ 1720 nsr_off = udf_check_vsd(sb); 1721 if (!nsr_off) { 1722 if (!silent) 1723 udf_warn(sb, "No VRS found\n"); 1724 return 0; 1725 } 1726 if (nsr_off == -1) 1727 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); 1728 if (!sbi->s_last_block) 1729 sbi->s_last_block = udf_get_last_block(sb); 1730 } else { 1731 udf_debug("Validity check skipped because of novrs option\n"); 1732 } 1733 1734 /* Look for anchor block and load Volume Descriptor Sequence */ 1735 sbi->s_anchor = uopt->anchor; 1736 if (!udf_find_anchor(sb, fileset)) { 1737 if (!silent) 1738 udf_warn(sb, "No anchor found\n"); 1739 return 0; 1740 } 1741 return 1; 1742 } 1743 1744 static void udf_open_lvid(struct super_block *sb) 1745 { 1746 struct udf_sb_info *sbi = UDF_SB(sb); 1747 struct buffer_head *bh = sbi->s_lvid_bh; 1748 struct logicalVolIntegrityDesc *lvid; 1749 struct logicalVolIntegrityDescImpUse *lvidiu; 1750 1751 if (!bh) 1752 return; 1753 1754 mutex_lock(&sbi->s_alloc_mutex); 1755 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1756 lvidiu = udf_sb_lvidiu(sbi); 1757 1758 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1759 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1760 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, 1761 CURRENT_TIME); 1762 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); 1763 1764 lvid->descTag.descCRC = cpu_to_le16( 1765 crc_itu_t(0, (char *)lvid + sizeof(struct tag), 1766 le16_to_cpu(lvid->descTag.descCRCLength))); 1767 1768 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); 1769 mark_buffer_dirty(bh); 1770 sbi->s_lvid_dirty = 0; 1771 mutex_unlock(&sbi->s_alloc_mutex); 1772 } 1773 1774 static void udf_close_lvid(struct super_block *sb) 1775 { 1776 struct udf_sb_info *sbi = UDF_SB(sb); 1777 struct buffer_head *bh = sbi->s_lvid_bh; 1778 struct logicalVolIntegrityDesc *lvid; 1779 struct logicalVolIntegrityDescImpUse *lvidiu; 1780 1781 if (!bh) 1782 return; 1783 1784 mutex_lock(&sbi->s_alloc_mutex); 1785 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1786 lvidiu = udf_sb_lvidiu(sbi); 1787 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1788 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1789 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); 1790 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) 1791 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); 1792 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) 1793 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); 1794 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) 1795 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); 1796 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); 1797 1798 lvid->descTag.descCRC = cpu_to_le16( 1799 crc_itu_t(0, (char *)lvid + sizeof(struct tag), 1800 le16_to_cpu(lvid->descTag.descCRCLength))); 1801 1802 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); 1803 /* 1804 * We set buffer uptodate unconditionally here to avoid spurious 1805 * warnings from mark_buffer_dirty() when previous EIO has marked 1806 * the buffer as !uptodate 1807 */ 1808 set_buffer_uptodate(bh); 1809 mark_buffer_dirty(bh); 1810 sbi->s_lvid_dirty = 0; 1811 mutex_unlock(&sbi->s_alloc_mutex); 1812 } 1813 1814 u64 lvid_get_unique_id(struct super_block *sb) 1815 { 1816 struct buffer_head *bh; 1817 struct udf_sb_info *sbi = UDF_SB(sb); 1818 struct logicalVolIntegrityDesc *lvid; 1819 struct logicalVolHeaderDesc *lvhd; 1820 u64 uniqueID; 1821 u64 ret; 1822 1823 bh = sbi->s_lvid_bh; 1824 if (!bh) 1825 return 0; 1826 1827 lvid = (struct logicalVolIntegrityDesc *)bh->b_data; 1828 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; 1829 1830 mutex_lock(&sbi->s_alloc_mutex); 1831 ret = uniqueID = le64_to_cpu(lvhd->uniqueID); 1832 if (!(++uniqueID & 0xFFFFFFFF)) 1833 uniqueID += 16; 1834 lvhd->uniqueID = cpu_to_le64(uniqueID); 1835 mutex_unlock(&sbi->s_alloc_mutex); 1836 mark_buffer_dirty(bh); 1837 1838 return ret; 1839 } 1840 1841 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) 1842 { 1843 int i; 1844 int nr_groups = bitmap->s_nr_groups; 1845 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * 1846 nr_groups); 1847 1848 for (i = 0; i < nr_groups; i++) 1849 if (bitmap->s_block_bitmap[i]) 1850 brelse(bitmap->s_block_bitmap[i]); 1851 1852 if (size <= PAGE_SIZE) 1853 kfree(bitmap); 1854 else 1855 vfree(bitmap); 1856 } 1857 1858 static void udf_free_partition(struct udf_part_map *map) 1859 { 1860 int i; 1861 struct udf_meta_data *mdata; 1862 1863 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) 1864 iput(map->s_uspace.s_table); 1865 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) 1866 iput(map->s_fspace.s_table); 1867 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) 1868 udf_sb_free_bitmap(map->s_uspace.s_bitmap); 1869 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) 1870 udf_sb_free_bitmap(map->s_fspace.s_bitmap); 1871 if (map->s_partition_type == UDF_SPARABLE_MAP15) 1872 for (i = 0; i < 4; i++) 1873 brelse(map->s_type_specific.s_sparing.s_spar_map[i]); 1874 else if (map->s_partition_type == UDF_METADATA_MAP25) { 1875 mdata = &map->s_type_specific.s_metadata; 1876 iput(mdata->s_metadata_fe); 1877 mdata->s_metadata_fe = NULL; 1878 1879 iput(mdata->s_mirror_fe); 1880 mdata->s_mirror_fe = NULL; 1881 1882 iput(mdata->s_bitmap_fe); 1883 mdata->s_bitmap_fe = NULL; 1884 } 1885 } 1886 1887 static int udf_fill_super(struct super_block *sb, void *options, int silent) 1888 { 1889 int i; 1890 int ret; 1891 struct inode *inode = NULL; 1892 struct udf_options uopt; 1893 struct kernel_lb_addr rootdir, fileset; 1894 struct udf_sb_info *sbi; 1895 1896 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); 1897 uopt.uid = -1; 1898 uopt.gid = -1; 1899 uopt.umask = 0; 1900 uopt.fmode = UDF_INVALID_MODE; 1901 uopt.dmode = UDF_INVALID_MODE; 1902 1903 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); 1904 if (!sbi) 1905 return -ENOMEM; 1906 1907 sb->s_fs_info = sbi; 1908 1909 mutex_init(&sbi->s_alloc_mutex); 1910 1911 if (!udf_parse_options((char *)options, &uopt, false)) 1912 goto error_out; 1913 1914 if (uopt.flags & (1 << UDF_FLAG_UTF8) && 1915 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { 1916 udf_err(sb, "utf8 cannot be combined with iocharset\n"); 1917 goto error_out; 1918 } 1919 #ifdef CONFIG_UDF_NLS 1920 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { 1921 uopt.nls_map = load_nls_default(); 1922 if (!uopt.nls_map) 1923 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); 1924 else 1925 udf_debug("Using default NLS map\n"); 1926 } 1927 #endif 1928 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) 1929 uopt.flags |= (1 << UDF_FLAG_UTF8); 1930 1931 fileset.logicalBlockNum = 0xFFFFFFFF; 1932 fileset.partitionReferenceNum = 0xFFFF; 1933 1934 sbi->s_flags = uopt.flags; 1935 sbi->s_uid = uopt.uid; 1936 sbi->s_gid = uopt.gid; 1937 sbi->s_umask = uopt.umask; 1938 sbi->s_fmode = uopt.fmode; 1939 sbi->s_dmode = uopt.dmode; 1940 sbi->s_nls_map = uopt.nls_map; 1941 rwlock_init(&sbi->s_cred_lock); 1942 1943 if (uopt.session == 0xFFFFFFFF) 1944 sbi->s_session = udf_get_last_session(sb); 1945 else 1946 sbi->s_session = uopt.session; 1947 1948 udf_debug("Multi-session=%d\n", sbi->s_session); 1949 1950 /* Fill in the rest of the superblock */ 1951 sb->s_op = &udf_sb_ops; 1952 sb->s_export_op = &udf_export_ops; 1953 1954 sb->s_dirt = 0; 1955 sb->s_magic = UDF_SUPER_MAGIC; 1956 sb->s_time_gran = 1000; 1957 1958 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { 1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1960 } else { 1961 uopt.blocksize = bdev_logical_block_size(sb->s_bdev); 1962 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1963 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { 1964 if (!silent) 1965 pr_notice("Rescanning with blocksize %d\n", 1966 UDF_DEFAULT_BLOCKSIZE); 1967 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; 1968 ret = udf_load_vrs(sb, &uopt, silent, &fileset); 1969 } 1970 } 1971 if (!ret) { 1972 udf_warn(sb, "No partition found (1)\n"); 1973 goto error_out; 1974 } 1975 1976 udf_debug("Lastblock=%d\n", sbi->s_last_block); 1977 1978 if (sbi->s_lvid_bh) { 1979 struct logicalVolIntegrityDescImpUse *lvidiu = 1980 udf_sb_lvidiu(sbi); 1981 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); 1982 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); 1983 /* uint16_t maxUDFWriteRev = 1984 le16_to_cpu(lvidiu->maxUDFWriteRev); */ 1985 1986 if (minUDFReadRev > UDF_MAX_READ_VERSION) { 1987 udf_err(sb, "minUDFReadRev=%x (max is %x)\n", 1988 le16_to_cpu(lvidiu->minUDFReadRev), 1989 UDF_MAX_READ_VERSION); 1990 goto error_out; 1991 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) 1992 sb->s_flags |= MS_RDONLY; 1993 1994 sbi->s_udfrev = minUDFWriteRev; 1995 1996 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) 1997 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); 1998 if (minUDFReadRev >= UDF_VERS_USE_STREAMS) 1999 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); 2000 } 2001 2002 if (!sbi->s_partitions) { 2003 udf_warn(sb, "No partition found (2)\n"); 2004 goto error_out; 2005 } 2006 2007 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & 2008 UDF_PART_FLAG_READ_ONLY) { 2009 pr_notice("Partition marked readonly; forcing readonly mount\n"); 2010 sb->s_flags |= MS_RDONLY; 2011 } 2012 2013 if (udf_find_fileset(sb, &fileset, &rootdir)) { 2014 udf_warn(sb, "No fileset found\n"); 2015 goto error_out; 2016 } 2017 2018 if (!silent) { 2019 struct timestamp ts; 2020 udf_time_to_disk_stamp(&ts, sbi->s_record_time); 2021 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", 2022 sbi->s_volume_ident, 2023 le16_to_cpu(ts.year), ts.month, ts.day, 2024 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); 2025 } 2026 if (!(sb->s_flags & MS_RDONLY)) 2027 udf_open_lvid(sb); 2028 2029 /* Assign the root inode */ 2030 /* assign inodes by physical block number */ 2031 /* perhaps it's not extensible enough, but for now ... */ 2032 inode = udf_iget(sb, &rootdir); 2033 if (!inode) { 2034 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", 2035 rootdir.logicalBlockNum, rootdir.partitionReferenceNum); 2036 goto error_out; 2037 } 2038 2039 /* Allocate a dentry for the root inode */ 2040 sb->s_root = d_alloc_root(inode); 2041 if (!sb->s_root) { 2042 udf_err(sb, "Couldn't allocate root dentry\n"); 2043 iput(inode); 2044 goto error_out; 2045 } 2046 sb->s_maxbytes = MAX_LFS_FILESIZE; 2047 sb->s_max_links = UDF_MAX_LINKS; 2048 return 0; 2049 2050 error_out: 2051 if (sbi->s_vat_inode) 2052 iput(sbi->s_vat_inode); 2053 if (sbi->s_partitions) 2054 for (i = 0; i < sbi->s_partitions; i++) 2055 udf_free_partition(&sbi->s_partmaps[i]); 2056 #ifdef CONFIG_UDF_NLS 2057 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2058 unload_nls(sbi->s_nls_map); 2059 #endif 2060 if (!(sb->s_flags & MS_RDONLY)) 2061 udf_close_lvid(sb); 2062 brelse(sbi->s_lvid_bh); 2063 2064 kfree(sbi->s_partmaps); 2065 kfree(sbi); 2066 sb->s_fs_info = NULL; 2067 2068 return -EINVAL; 2069 } 2070 2071 void _udf_err(struct super_block *sb, const char *function, 2072 const char *fmt, ...) 2073 { 2074 struct va_format vaf; 2075 va_list args; 2076 2077 /* mark sb error */ 2078 if (!(sb->s_flags & MS_RDONLY)) 2079 sb->s_dirt = 1; 2080 2081 va_start(args, fmt); 2082 2083 vaf.fmt = fmt; 2084 vaf.va = &args; 2085 2086 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); 2087 2088 va_end(args); 2089 } 2090 2091 void _udf_warn(struct super_block *sb, const char *function, 2092 const char *fmt, ...) 2093 { 2094 struct va_format vaf; 2095 va_list args; 2096 2097 va_start(args, fmt); 2098 2099 vaf.fmt = fmt; 2100 vaf.va = &args; 2101 2102 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); 2103 2104 va_end(args); 2105 } 2106 2107 static void udf_put_super(struct super_block *sb) 2108 { 2109 int i; 2110 struct udf_sb_info *sbi; 2111 2112 sbi = UDF_SB(sb); 2113 2114 if (sbi->s_vat_inode) 2115 iput(sbi->s_vat_inode); 2116 if (sbi->s_partitions) 2117 for (i = 0; i < sbi->s_partitions; i++) 2118 udf_free_partition(&sbi->s_partmaps[i]); 2119 #ifdef CONFIG_UDF_NLS 2120 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) 2121 unload_nls(sbi->s_nls_map); 2122 #endif 2123 if (!(sb->s_flags & MS_RDONLY)) 2124 udf_close_lvid(sb); 2125 brelse(sbi->s_lvid_bh); 2126 kfree(sbi->s_partmaps); 2127 kfree(sb->s_fs_info); 2128 sb->s_fs_info = NULL; 2129 } 2130 2131 static int udf_sync_fs(struct super_block *sb, int wait) 2132 { 2133 struct udf_sb_info *sbi = UDF_SB(sb); 2134 2135 mutex_lock(&sbi->s_alloc_mutex); 2136 if (sbi->s_lvid_dirty) { 2137 /* 2138 * Blockdevice will be synced later so we don't have to submit 2139 * the buffer for IO 2140 */ 2141 mark_buffer_dirty(sbi->s_lvid_bh); 2142 sb->s_dirt = 0; 2143 sbi->s_lvid_dirty = 0; 2144 } 2145 mutex_unlock(&sbi->s_alloc_mutex); 2146 2147 return 0; 2148 } 2149 2150 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) 2151 { 2152 struct super_block *sb = dentry->d_sb; 2153 struct udf_sb_info *sbi = UDF_SB(sb); 2154 struct logicalVolIntegrityDescImpUse *lvidiu; 2155 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 2156 2157 if (sbi->s_lvid_bh != NULL) 2158 lvidiu = udf_sb_lvidiu(sbi); 2159 else 2160 lvidiu = NULL; 2161 2162 buf->f_type = UDF_SUPER_MAGIC; 2163 buf->f_bsize = sb->s_blocksize; 2164 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; 2165 buf->f_bfree = udf_count_free(sb); 2166 buf->f_bavail = buf->f_bfree; 2167 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + 2168 le32_to_cpu(lvidiu->numDirs)) : 0) 2169 + buf->f_bfree; 2170 buf->f_ffree = buf->f_bfree; 2171 buf->f_namelen = UDF_NAME_LEN - 2; 2172 buf->f_fsid.val[0] = (u32)id; 2173 buf->f_fsid.val[1] = (u32)(id >> 32); 2174 2175 return 0; 2176 } 2177 2178 static unsigned int udf_count_free_bitmap(struct super_block *sb, 2179 struct udf_bitmap *bitmap) 2180 { 2181 struct buffer_head *bh = NULL; 2182 unsigned int accum = 0; 2183 int index; 2184 int block = 0, newblock; 2185 struct kernel_lb_addr loc; 2186 uint32_t bytes; 2187 uint8_t *ptr; 2188 uint16_t ident; 2189 struct spaceBitmapDesc *bm; 2190 2191 loc.logicalBlockNum = bitmap->s_extPosition; 2192 loc.partitionReferenceNum = UDF_SB(sb)->s_partition; 2193 bh = udf_read_ptagged(sb, &loc, 0, &ident); 2194 2195 if (!bh) { 2196 udf_err(sb, "udf_count_free failed\n"); 2197 goto out; 2198 } else if (ident != TAG_IDENT_SBD) { 2199 brelse(bh); 2200 udf_err(sb, "udf_count_free failed\n"); 2201 goto out; 2202 } 2203 2204 bm = (struct spaceBitmapDesc *)bh->b_data; 2205 bytes = le32_to_cpu(bm->numOfBytes); 2206 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ 2207 ptr = (uint8_t *)bh->b_data; 2208 2209 while (bytes > 0) { 2210 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); 2211 accum += bitmap_weight((const unsigned long *)(ptr + index), 2212 cur_bytes * 8); 2213 bytes -= cur_bytes; 2214 if (bytes) { 2215 brelse(bh); 2216 newblock = udf_get_lb_pblock(sb, &loc, ++block); 2217 bh = udf_tread(sb, newblock); 2218 if (!bh) { 2219 udf_debug("read failed\n"); 2220 goto out; 2221 } 2222 index = 0; 2223 ptr = (uint8_t *)bh->b_data; 2224 } 2225 } 2226 brelse(bh); 2227 out: 2228 return accum; 2229 } 2230 2231 static unsigned int udf_count_free_table(struct super_block *sb, 2232 struct inode *table) 2233 { 2234 unsigned int accum = 0; 2235 uint32_t elen; 2236 struct kernel_lb_addr eloc; 2237 int8_t etype; 2238 struct extent_position epos; 2239 2240 mutex_lock(&UDF_SB(sb)->s_alloc_mutex); 2241 epos.block = UDF_I(table)->i_location; 2242 epos.offset = sizeof(struct unallocSpaceEntry); 2243 epos.bh = NULL; 2244 2245 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) 2246 accum += (elen >> table->i_sb->s_blocksize_bits); 2247 2248 brelse(epos.bh); 2249 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); 2250 2251 return accum; 2252 } 2253 2254 static unsigned int udf_count_free(struct super_block *sb) 2255 { 2256 unsigned int accum = 0; 2257 struct udf_sb_info *sbi; 2258 struct udf_part_map *map; 2259 2260 sbi = UDF_SB(sb); 2261 if (sbi->s_lvid_bh) { 2262 struct logicalVolIntegrityDesc *lvid = 2263 (struct logicalVolIntegrityDesc *) 2264 sbi->s_lvid_bh->b_data; 2265 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { 2266 accum = le32_to_cpu( 2267 lvid->freeSpaceTable[sbi->s_partition]); 2268 if (accum == 0xFFFFFFFF) 2269 accum = 0; 2270 } 2271 } 2272 2273 if (accum) 2274 return accum; 2275 2276 map = &sbi->s_partmaps[sbi->s_partition]; 2277 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { 2278 accum += udf_count_free_bitmap(sb, 2279 map->s_uspace.s_bitmap); 2280 } 2281 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { 2282 accum += udf_count_free_bitmap(sb, 2283 map->s_fspace.s_bitmap); 2284 } 2285 if (accum) 2286 return accum; 2287 2288 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { 2289 accum += udf_count_free_table(sb, 2290 map->s_uspace.s_table); 2291 } 2292 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { 2293 accum += udf_count_free_table(sb, 2294 map->s_fspace.s_table); 2295 } 2296 2297 return accum; 2298 } 2299